A circular-shaped item designed to maintain predetermined distance between assembled parts and/or for distributing pressure or preventing endwise movement between member parts. It has a solid cross-section and two flat parallel bearing surfaces. The distance between the bearing surfaces perpendicular to the axis of the centrally located hole shall not exceed 25 percent of the outside diameter. The diameter of the centrally located hole must exceed 75 percent of the outside diameter. Excludes laminated items. For items manufactured from impregnated graphite or lubricated nonmetallic materials, excluding felt or plastics, see gasket. For items manufactured from lubricated plastics, see bearing, washer, thrust. For items manufactured from lubricated felt, see felt, mechanical, preformed. Excludes disk, valve; insulator washer; and shim. See also spacer, plate and spacer, sleeve.
Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 6620-00-933-3640
NSN 5930-00-468-8320
NSN 5945-01-625-7101
NSN 5998-00-401-9675
NSN 5999-01-607-0486
NSN 2925-00-526-4541
NSN 5855-00-401-3442
NSN 5925-00-448-2543
NSN 6220-01-059-1393
NSN 4140-00-914-7949
NSN 6145-01-092-2183
NSN 7035-01-660-3940